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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Plugin to check submitted notices with blogspam.net
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Plugin
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
define('BLOGSPAMNETPLUGIN_VERSION', '0.1');
/**
* Plugin to check submitted notices with blogspam.net
*
* When new notices are saved, we check their text with blogspam.net (or
* a compatible service).
*
* Blogspam.net is supposed to catch blog comment spam, and I found that
* some of its tests (min/max size, bayesian match) gave a lot of false positives.
* So, I've turned those tests off by default. This may not get as many
* hits, but it's better than nothing.
*
* @category Plugin
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*
* @see Event
*/
class BlogspamNetPlugin extends Plugin
{
var $baseUrl = 'http://test.blogspam.net:8888/';
function __construct($url=null)
{
parent::__construct();
if ($url) {
$this->baseUrl = $url;
}
}
function onStartNoticeSave($notice)
{
$args = $this->testArgs($notice);
common_debug("Blogspamnet args = " . print_r($args, TRUE));
$request = xmlrpc_encode_request('testComment', array($args));
$context = stream_context_create(array('http' => array('method' => "POST",
'header' =>
"Content-Type: text/xml\r\n".
"User-Agent: " . $this->userAgent(),
'content' => $request)));
$file = file_get_contents($this->baseUrl, false, $context);
$response = xmlrpc_decode($file);
if (xmlrpc_is_fault($response)) {
throw new ServerException("$response[faultString] ($response[faultCode])", 500);
} else {
common_debug("Blogspamnet results = " . $response);
if (preg_match('/^ERROR(:(.*))?$/', $response, $match)) {
throw new ServerException(sprintf(_("Error from %s: %s"), $this->baseUrl, $match[2]), 500);
} else if (preg_match('/^SPAM(:(.*))?$/', $response, $match)) {
throw new ClientException(sprintf(_("Spam checker results: %s"), $match[2]), 400);
} else if (preg_match('/^OK$/', $response)) {
// don't do anything
} else {
throw new ServerException(sprintf(_("Unexpected response from %s: %s"), $this->baseUrl, $response), 500);
}
}
return true;
}
function testArgs($notice)
{
$args = array();
$args['comment'] = $notice->content;
$args['ip'] = $this->getClientIP();
if (isset($_SERVER) && array_key_exists('HTTP_USER_AGENT', $_SERVER)) {
$args['agent'] = $_SERVER['HTTP_USER_AGENT'];
}
$profile = $notice->getProfile();
if ($profile && $profile->homepage) {
$args['link'] = $profile->homepage;
}
if ($profile && $profile->fullname) {
$args['name'] = $profile->fullname;
} else {
$args['name'] = $profile->nickname;
}
$args['site'] = common_root_url();
$args['version'] = $this->userAgent();
$args['options'] = "max-size=140,min-size=0,min-words=0,exclude=bayasian";
return $args;
}
function getClientIP()
{
if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
// Note: order matters here; use proxy-forwarded stuff first
foreach (array('HTTP_X_FORWARDED_FOR', 'CLIENT-IP', 'REMOTE_ADDR') as $k) {
if (isset($_SERVER[$k])) {
return $_SERVER[$k];
}
}
}
return '127.0.0.1';
}
function userAgent()
{
return 'BlogspamNetPlugin/'.BLOGSPAMNETPLUGIN_VERSION . ' Laconica/' . LACONICA_VERSION;
}
}
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